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STTS424BDA3E Datasheet(PDF) 2 Page - STMicroelectronics |
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STTS424BDA3E Datasheet(HTML) 2 Page - STMicroelectronics |
2 / 7 page Description STTS424 2/7 Description The STTS424 is targeted for DIMM modules in Mobile Personal Computing Platforms (Laptops), Server Memory Modules, and other industrial applications. The thermal sensor (TS) in the STTS424 is fully compliant to the JEDEC 42.4 specification which defines Memory Module Thermal Sensors requirements for Mobile platforms. The TS provides space as well as cost savings for Mobile and Server Platform Dual Inline Memory Modules (DIMM) manufacturers, as it is packaged in the compact 2mm x 3mm 8- lead DFN package which has a height that will not exceed 0.9mm. It is also available in the JEDEC compliant TSSOP8 package. The temperature sensor includes a band gap-based temperature sensor and 10-bit Analog- to-Digital Converter (ADC) which monitor and digitize the temperature to a resolution of up to 0.25°C. The typical accuracies over these temperature ranges are: ● ±3°C (max) over the full temperature measurement range of –40°C to 125°C, ● ±2°C in the +40°C to +125°C temperature range, and ● ±1°C in the +75°C to +95°C temperature range. The temperature sensor in the STTS424 is specified for operating at supply voltages from 2.7V to 3.6V. Operating at 3.3V, the supply current is 100µA (typ). The on-board sigma delta ADC converts the measured temperature to a digital value that is calibrated in °C. For Fahrenheit applications, a lookup table or conversion routine is required. The STTS424 is factory-calibrated and requires no external components to measure temperature. The digital temperature sensor component has user-programmable registers that provide the capabilities for DIMM temperature-sensing applications. The open drain Event output pin is active when the monitoring temperature exceeds a programmable limit, or it falls above or below an alarm window. The user has the option to set the Event output as a critical temperature output. This pin can be configured to operate in either a comparator mode for thermostat operation or in interrupt mode. |
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